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The pandemic has led to adverse short-term outcomes for patients with ST-segment elevation myocardial infarction (STEMI). It is unknown if this translates to poorer long-term outcomes. In Singapore, the escalation of the outbreak response on February 7, 2020 demanded adaptation of STEMI care to stringent infection control measures. A total of 321 patients presenting with STEMI and undergoing primary percutaneous coronary intervention at a tertiary hospital were enrolled and followed up over 1-year. They were allocated into three groups based on admission date-(1) Before outbreak response (BOR): December 1, 2019-February 6, 2020, (2) During outbreak response (DOR): February 7-March 31, 2020, and (3) control group: November 1-December 31, 2018. The incidence of cardiac-related mortality, cardiac-related readmissions, and recurrent coronary events were examined. Although in-hospital outcomes were worse in BOR and DOR groups compared to the control group, there were no differences in the 1-year cardiac-related mortality (BOR 8.7%, DOR 7.1%, control 4.8%, p = 0.563), cardiac-related readmissions (BOR 15.1%, DOR 11.6%, control 12.0%, p = 0.693), and recurrent coronary events (BOR 3.2%, DOR 1.8%, control 1.2%, p = 0.596). There were higher rates of additional PCI during the index admission in DOR, compared to BOR and control groups (p = 0.027). While patients admitted for STEMI during the pandemic may have poorer in-hospital outcomes, their long-term outcomes remain comparable to the pre-pandemic era., (© 2021. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)

Left ventricular thrombus (LVT) is a common complication of acute myocardial infarction and is associated with morbidity from embolic complications. Predicting which patients will develop death or persistent LVT despite anticoagulation may help clinicians identify high-risk patients. We developed a random forest (RF) model that predicts death or persistent LVT and evaluated its performance. This was a single-center retrospective cohort study in an academic tertiary center. We included 244 patients with LVT in our study. Patients who did not receive anticoagulation (n = 8) or had unknown (n = 31) outcomes were excluded. The primary outcome was a composite outcome of death, recurrent LVT and persistent LVT. We selected a total of 31 predictors collected at the point of LVT diagnosis based on clinical relevance. We compared conventional regularized logistic regression with the RF algorithm. There were 156 patients who had resolution of LVT and 88 patients who experienced the composite outcome. The RF model achieved better performance and had an AUROC of 0.700 (95% CI 0.553-0.863) on a validation dataset. The most important predictors for the composite outcome were receiving a revascularization procedure, lower visual ejection fraction (EF), higher creatinine, global wall motion abnormality, higher prothrombin time, higher body mass index, higher activated partial thromboplastin time, older age, lower lymphocyte count and higher neutrophil count. The RF model accurately identified patients with post-AMI LVT who developed the composite outcome. Further studies are needed to validate its use in clinical practice., (© 2021. The Author(s), under exclusive licence to Springer Science+Business Media, LLC part of Springer Nature.)

Acute ischemic stroke (AIS) is a feared complication in post-acute myocardial infarction (AMI) patients who develop left ventricular (LV) thrombus. There is limited data available on the incidence of stroke in this population, and characterisation of stroke subtypes has not been previously reported. Our study aims to evaluate the incidence of AIS in post-AMI patients with LV thrombus and to characterise the pattern of stroke subtypes. We screened 5829 patients with echocardiogram reports containing the "thrombus" keyword from August 2006 to September 2017. AIS that occurred after LV thrombosis was captured and relevant clinical data was collected. We identified 289 post-AMI patients with acute LV thrombus formation. Mean age was 59.3 ± 13.4 years. AIS occurred in 34 patients (11.8%), median duration of 20.5 days (IQR = 5.5-671.8) after LV thrombosis. Despite initial thrombus resolution, nine (5.2%) encountered AIS subsequently. Cardioembolic stroke subtype was identified in 76.5% of AIS, whilst 14.7% was small vessel disease and 8.8% was of large artery atherosclerosis subtype. Presence of thrombus protrusion (HR 3.04, 95% CI 1.25-7.41, p = 0.01), failure of initial thrombus resolution (HR 3.03, 95% CI 1.23-7.45, p = 0.02) and thrombus recurrence (HR 4.20, 95% CI 1.46-12.11, p < 0.01) were significant independent predictors for stroke. Incidence of AIS in this Asian population of post-AMI patients with LV thrombus was 11.8%. Duration of anticoagulation may need to be individualised for patients with higher risk for stroke occurrence after LV thrombosis.

Left ventricular (LV) thrombus is commonly seen in patients with extensive anterior ST-elevation myocardial infarction. The standard of care for LV thrombus is anticoagulation with warfarin. However, there has been an increasing trend of case reports using non-vitamin K antagonist oral anticoagulants (NOAC) for the treatment of LV thrombus. This study aimed to perform a meta-summary of the literature to characterise and evaluate the safety and feasibility of using NOAC in patients with LV thrombus. We searched for articles published in four electronic databases: PubMed, EMBASE, Scopus and Google Scholar using an appropriate keyword/MeSH term search strategy. Twenty-four studies comprising 36 patients were included in the analysis. Rivaroxaban was used in majority of patients (47.2%), whilst Apixaban and Dabigatran were prescribed in 25.0% and 27.8% of patients respectively. The most commonly associated risk factor found was post-acute myocardial infarction in 15 patients (41.7%). LV thrombus resolution was met by most patients (87.9%), and the median duration of treatment to resolution was 30.0 days (IQR = 22.5-47.0). One non-fatal bleeding event (3.0%) and no embolic events were reported. The use of NOAC may have a role in the treatment of LV thrombus in selected patients. Further randomized controlled trials are needed to evaluate this treatment strategy.